我们经常会遇到linux的系统更换硬盘到其他机器,或者克隆虚拟机时网卡不能启动报错的情况,
用ifconfig命令不能看到我们的网卡信息,具体报错如下图:
为什么会造成这样的情况呢?
因为centos系统做好后,网卡的配置文件会把网卡的mac地址记录在配置文件中,
更换硬盘或者更克隆系统的时候,配置文件跟过来的是上个机器的mac地址信息,
所以会造成重启网卡不成功,报错,看不到网卡信息的情况!
如何解决这类问题呢!
具体解决方法如下:
首先,打开/etc/udev/rules.d/70-persistent-net.rules内容如下面例子所示:
# vi /etc/udev/rules.d/70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.
# PCI device 0x1022:0x2000 (pcnet32)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:8f:89:97",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x1022:0x2000 (pcnet32)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:50:bd:17",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
这时需要记录下,eth1网卡的mac地址00:0c:29:50:bd:17
接下来,打开/etc/sysconfig/network-scripts/ifcfg-eth0
# vi /etc/sysconfig/network-scripts/ifcfg-eth0
将 DEVICE="eth0" 改成 DEVICE="eth1" ,
将 HWADDR="00:0c:29:8f:89:97" 改成上面的mac地址 HWADDR="00:0c:29:50:bd:17"
最后,重启网络
# service network restart
或者
# /etc/init.d/network restart
这时发现重启网卡可以启动了
问题解决
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